S.=

Trees with alternate, simple, large, palmately lobed leaves. The base of
the petiole is hollowed to cover the bud. Flowers inconspicuous; in
early spring. Fruit a large, dry ball, hanging on a long peduncle, and
remaining on the tree through the winter. Large tree with white bark
separating into thin, brittle plates.

[Illustration: P. occidentalis.]

1. =Platanus occidentalis=, L. (AMERICAN SYCAMORE. BUTTONWOOD.) Leaves
large (6 to 10 in. broad), roundish heart-shaped, angularly
sinuate-lobed, the short lobes sharp-pointed, scurfy-downy till old.
Fruit globular, solitary, 1 in. in diameter, hanging on long, 4-in.
peduncles; remaining on the tree through the winter. A large, well-known
tree, 80 to 100 ft. high; found on river-banks throughout; also
cultivated. Wood brownish, coarse-grained; it cannot be split, and is
very difficult to smooth. The marking of the grain on the quartered
lumber is very beautiful.

[Illustration: P. orientalis.]

2. =Platanus orientalis=, L. (ORIENTAL PLANE.) Leaves more deeply cut,
smaller, and sooner smooth than those of the American Sycamore. Fruit
frequently clustered on the peduncles. This tree is similar to the
American Sycamore, and in many ways better for cultivation.

ORDER =XXXVIII. JUGLANDACEAE.=

(WALNUT FAMILY.)

A small order of useful nut-and timber-trees.

GENUS =81. JUGLANS.=

Trees with alternate, odd-pinnate leaves, of 5 to 17 leaflets, with 2 to
4 axillary buds, the uppermost the largest. Flowers inconspicuous, the
sterile ones in catkins. May. Fruit a large, bony, edible nut surrounded
by a husk that has no regular dehiscence. The nut, as in the genus
Carya, has a bony partition between the halves of the kernel.

* Leaflets 13 to 17, strongly serrate; husk of the fruit not
separating from the very rough, bony nut; native. (=A.=)

=A.= Upper axillary bud cylindrical, whitish with hairs; nut
elongated 1.

=A.= Upper axillary bud ovate, pointed; nut globular 2.

* Leaflets 5 to 9; husk of the fruit separating when dry from the
smoothish, thin-shelled nut; cultivated 3.

[Illustration: J. cinerea.]

1. =Juglans cinerea=, L. (BUTTERNUT. WHITE WALNUT.) Leaflets 11 to 17,
lanceolate, rounded at base, serrate with shallow teeth; downy,
especially beneath; leafstalk sticky or gummy. Buds oblong,
white-to-mentose. Fruit oblong, clamm